Question about 1990 Ford F150

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Ignition my 90 4.9 5 speed straight 6 will not start without starting fluid, it will run after, not great due to a one spark plug not working, fuel pump works fine. why wont it start without the starting fluid sprayed?

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  • stavrev Aug 22, 2008

    thanks lesabre1972 i will give it a try, truck isnt with me now but ill have a chance to look at it in about a week

  • Anonymous Mar 10, 2009

    I have a 1992 ford F-150 6-Cylinder , when i turn the key on I hear a loud humming noise from the fuel tanks. during this time the engine will not start once in a while I will get lucky , and the humming noise will last only a few seconds and the engine light will go of and the engine will start and run. But the exhaust smells like paint laquer. 

  • cla_bad89 Mar 15, 2009

    i have a 90 mod but its a 5.8 2 wheel drive that only starts when i spray starting fluid in the throttle body

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First try to step on gas about one quarter throttle then try to start.If it starts like that I would change the Idle Air Control valve.

Posted on Aug 22, 2008

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2 Answers

1991 F150 Will not crank.


Do real fuel pressure test using test gauge. You changed ignition module but not coil? Are you getting nice fat blue spark? When spraying starter fluid into intake it only tries to start which makes me think you have ignition problem.

May 18, 2015 | Ford F-150 Cars & Trucks

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Its a 1993 dodge colt vista se we shut off the engine & know it just turns over but wont start


Probably lost either spark or fuel to the engine. Try starting it with starting fluid into the intake. If nothing happens, check for spark on a spark plug wire- probably the ignition system. If it runs for a second or two with starting fluid, it is a fuel problem-check fuel pressure to see if the fuel pump is still working.

Nov 01, 2014 | 1993 Dodge Colt

1 Answer

Cranks but wont start


Likely a fuel delivery problem.

Check the filter, as it may be clogged and due for replacement. To test for fuel delivery, open your airbox and spray some starter fluid (purified ether, usually) down into the throttle body while someone else cranks the engine. If it fires up and runs for a few seconds but won't run without spraying the starter fluid, then you know you've got spark and compression. If that's the case, there could be any number of potential issues: throttle position sensor (not very common, but it does happen), fuel injectors clogged (common if you use low-grade fuel), fuel filter/strainer clogged (filters should be replaced every 30k miles or so, on average), fuel pump failure (you should hear a buzzing from the fuel pump when you crank the engine).

If the starter fluid doesn't help, then the problem is no spark. Check each plug/cable for fouling.

Feb 08, 2014 | Toyota RAV4 Cars & Trucks

1 Answer

Spec vin ecu specs


If it turns, then the battery is OK. Either spark plugs are not firing in proper order (wrong firing order), no power to spark plugs, or no fuel because of fuel restrictions (dirty fuel filter). Inspect the air filter to ascertain its not clogged air. If you smell gas, then you saturated the spark plugs, which is why it refuses to run.
Let it sit for half hour to let spark plugs dry. Inspect to ascertain its not dirty spark plugs, which will also prevent engine from running. After ascertaining its proper firing order, spark plugs are clean, and there's power to distributor cap, ascertain there's fuel in fuel lines by squirting half second (short squirt) of starting fluid into air filter. Close the air filter housing to trap flammable starting fluid gas. Turn engine without giving throttle. Let starting fluid be ignited by spark plugs. If it won't start, then spark plugs are not firing to ignite starting fluid gas. If it starts briefly, but won't run when you give throttle, but catches when a 2nd person squirts more starting fluid into air filter just before engine stalls, then its a fuel restriction issue or no fuel in fuel lines.

Nov 29, 2013 | Cars & Trucks

1 Answer

Fuel pump


Testing of the fuel and ignition systems is in order. Intermittent problems need testing when the problem is present, otherwise it won't help find the problem.
I would start by checking for spark on a spark plug wire (or two or three plug wires, in case it may be a bad coil), during those times when it won't start. You need to see a blue, snapping spark to verify ignition system is working.
To check the fuel system, have the fuel pressure checked, and the injector circuit checked. Good that you hear the pump, but you don't know if fuel pressure is correct, or if fuel is getting into the cylinders. One short test is to spray starting fluid or carb cleaner into the intake while engine is cranking. If engine fires up for a few seconds, you know it is a gas related problem.
If ignition system is the intermittent problem, could be failing coil or coils, ignition module, crank position sensor, even the computer, or a wiring problem like a bad connection. Testing of each component will be required, or you could start throwing new parts at it, like many people do, until you find the bad part. Find a reputable mechanic-there still are a few, lol.

Jul 30, 2013 | 1998 GMC Sierra

1 Answer

Cranks, why no start?


Usually because of an ignition or gas related problem. You need to check for spark at the plugs and for gas at the engine.

A quick method to check for a gas problem is to spray some starting fluid into the air intake on the throttle body. Take off the big boot from air filter housing to the engine, spray a shot of fluid into the engine, then try to start it. If it fires up and tries to run from the fluid for a few seconds, then you know it is a fuel problem. Maybe the fuel pump has quit working, or the fuel filter is clogged. If both are good, maybe a fuel injector circuit problem, less common but possible.

If nothing happens from the starting fluid, it may be ignition related-not getting spark. Pull off a spark plug wire from a spark plug and hold the plug wire end terminal about 1/4 inch from an engine bolt or ground. Have someone crank the engine over from the key and watch for a consistent, blue, snapping spark. If no spark, test a few other plug wires to verify no spark at all. So it is not just one ignition coil not working, but none of them produce spark. No spark means the ignition system needs diagnosing. Sometimes it is the ignition control module that goes bad-it can be tested at any parts store. Post back and we can go from there.

Jan 31, 2013 | 2000 Isuzu Rodeo

2 Answers

My van just turned off as i was driving. it tries to turn over but wont.. it has gas what might the problem be


Check for spark in order to see if the engine's ignition system is working.
Add starting fluid to the intake to see if it starts for a few seconds.
If the car does start, then it's a fuel delivery problem such as a fuel pump or a computer that doesn't allow fuel injectors to pulse.

If it doesn't start, then the spark is likely not being delivered to the spark plugs.
One can double check this by using a spark tester for the spark plug boot removed from the spark plug and grounded to the chassis.

Feb 12, 2011 | 1998 Plymouth Voyager

2 Answers

1997 Jimmy cranks but wont start can hear fuel pump run


There's 2 things that an engine needs to start. One is ...it has to have spark to the spark plugs to detonate the fuel fumes inside the cylinders. Check for spark by removing a spark plug the placing the spark plug next to a ground. Use heavy gloves or rubber gloves so you won't get a shock if it does have spark. Have somebody crank the engine. it should fire a blue spark at the spark plug tip. if it does not. Your problem is you don't have a spark. You have to look at several things that might be causing the lack of spark. It could be the coil or coils, the distributer system , or the ignition system such as your switch.

The other thing it needs is fuel. the fuel system has to be workng right to start your car. Check that the fuel pump is working and that the fuel is being distributed properly.

With the brief explanation you gave that's all I can sy for now.

Jan 10, 2010 | 1997 GMC Jimmy

1 Answer

No start new plugs,cap,rotor new coil icm modual put starting fluid in still no start will turn over all day


1. Check the spark plug gaps. It should be adjusted
to the thickness of a hacksaw blade.
2. You replace almost all of the ignition parts but not
the hi-tension cables of the plugs and the coil.
Have this replaced.
3. Check all the plug for sparks. Sparks must be blue
in color to indicate good voltage to burn the fuel
and run your engines.
4. When everything in the ignition is working, check
the fuel at the carb if it has a good spray.
5. Check the air-fuel adjuster at the carburetor. From
full close position, turn 2-1/2 full turns counter
clockwise.
6. Then, start your engines and go.

Nov 01, 2009 | 1993 Ford F150 SuperCab

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